Behringer MA400 Headphone Amplifier Features: ■ Compact headphone amplifier for studio and stage use. ■ Allows mixing of microphone and monitor signals for headphone monitoring. ■ Equipped with a ground lift switch for the microphone input and a microphone thru. ■ Features a monitor level controller and a MONO/STEREO switch for the monitor input. ■ High-power headphone output with 6.3/3.5mm stereo jacks. ■ Includes a 12 V DC adapter. ■ High-quality components and a very robust construction ensure reliable operation for many years. ■ Designed and engineered by BEHRINGER Germany. Used only once for testing.